SQL 带有 WITH 子句的值太多错误

Question

--此查询返回 "too many values" 错误。我不确定为什么？

   update myTable
            set var1= var2
            WHERE value1 IN (

             WITH X AS
            (
            select value1, value2, var1,var2, ROW_NUMBER()
            OVER
            (PARTITION BY value1 ORDER BY value1 desc) as rn
            from
              mytable WHERE var1 is null AND rownum>0 and rownum<=10 order by value1 asc
            )
            SELECT
            value1, value2, var2,var1
           FROM X WHERE rn=1  and var1 is null and rownum>0 and rownum<=10);

Answer 1

错误too many values是因为查询value1 IN ()在内部查询中选择了多个列。为避免这种情况，内部查询中只需 select value1。

update myTable
set var1 = var2
WHERE value1 IN
     (select value1 from 
       (select value1, value2, var1,var2, 
        ROW_NUMBER() OVER (PARTITION BY value1 ORDER BY value1 desc) as rn
        from mytable 
        WHERE var1 is null
        ) t 
      where rn <= 10
      )

Answer 2

我认为使用 exists:

可以更好地满足您的意图

update myTable
    set var1 = var2
    where exists (select 1
                  from (select value1, value2, var1, var2, 
                               ROW_NUMBER() OVER (PARTITION BY value1 ORDER BY value1 desc) as rn
                       from mytable 
                       where var1 is null
                      ) x
                  where mytable.value1 in (x.value1, x.value2, x.var1, x.var2) and
                        rn <= 10
                 );

SQL 带有 WITH 子句的值太多错误

SQL with WITH clause too many values error

sql

sqlplus

with-statement

oracle11g